404s when replying

 
Had a couple of these in the last few days when clicking ‘post’ after having written a reply. 
Disconcerting.

 

Server Error in ‘/forum’ Application.

        <h2> <i>The resource cannot be found.</i> </h2></span>

        <font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">

        <b> Description: </b>HTTP
  1. The resource you are looking for (or one of its dependencies)
    could have been removed, had its name changed, or is temporarily
    unavailable.  Please review the following URL and make sure that it is
    spelled correctly.

       <b> Requested URL: </b>/forum/forums/p/1700/7048.aspx<br><br>
    
       <hr size="1" width="100%" color="silver">
    
       <b>Version Information:</b>&nbsp;Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210&nbsp;
    
       </font><br>

I often get the same error when I click the link in the notification email. Not always but more often than not.